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1. WO2007095929 - VORRICHTUNG UND VERFAHREN ZUM FÜGEN VON WENIGSTENS ZWEI AUS THERMOPLASTISCHEM MATERIAL BESTEHENDEN FÜGEPARTNER MITTELS LASERSTRAHLUNG

Veröffentlichungsnummer WO/2007/095929
Veröffentlichungsdatum 30.08.2007
Internationales Aktenzeichen PCT/DE2007/000341
Internationales Anmeldedatum 22.02.2007
IPC
B29C 65/16 2006.01
BArbeitsverfahren; Transportieren
29Verarbeiten von Kunststoffen; Verarbeiten von Stoffen in plastischem Zustand allgemein
CFormen oder Verbinden von Kunststoffen; Formen von Werkstoffen in plastischem Zustand, soweit nicht anderweitig vorgesehen; Nachbehandlung der geformten Erzeugnisse, z.B. Reparieren
65Verbinden vorgeformter Teile; Vorrichtungen hierfür
02durch Erwärmen, mit oder ohne Druck
14durch Wellenenergie oder Teilchenstrahlung
16Laserstrahlen
CPC
B23K 26/037
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
035Aligning the laser beam
037by pressing on the workpiece, e.g. pressing roller foot
B23K 26/0604
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
06Shaping the laser beam, e.g. by masks or multi-focusing
0604by a combination of beams
B23K 26/0608
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
06Shaping the laser beam, e.g. by masks or multi-focusing
0604by a combination of beams
0608in the same heat affected zone [HAZ]
B23K 26/067
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
06Shaping the laser beam, e.g. by masks or multi-focusing
067Dividing the beam into multiple beams, e.g. multifocusing
B29C 65/1609
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
65Joining ; or sealing; of preformed parts ; , e.g. welding of plastics materials; Apparatus therefor
02by heating, with or without pressure
14using wave energy ; , i.e. electromagnetic radiation,; or particle radiation
16Laser beams
1603characterised by the type of electromagnetic radiation
1609Visible light radiation, e.g. by visible light lasers
B29C 65/1616
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
65Joining ; or sealing; of preformed parts ; , e.g. welding of plastics materials; Apparatus therefor
02by heating, with or without pressure
14using wave energy ; , i.e. electromagnetic radiation,; or particle radiation
16Laser beams
1603characterised by the type of electromagnetic radiation
1612Infrared [IR] radiation, e.g. by infrared lasers
1616Near infrared radiation [NIR], e.g. by YAG lasers
Anmelder
  • FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. [DE]/[DE] (AllExceptUS)
  • POGGEL, Matthias [DE]/[DE] (UsOnly)
  • GILLNER, Arnold [DE]/[DE] (UsOnly)
Erfinder
  • POGGEL, Matthias
  • GILLNER, Arnold
Vertreter
  • RÖSLER, Uwe
Prioritätsdaten
10 2006 008776.324.02.2006DE
Veröffentlichungssprache Deutsch (DE)
Anmeldesprache Deutsch (DE)
Designierte Staaten
Titel
(DE) VORRICHTUNG UND VERFAHREN ZUM FÜGEN VON WENIGSTENS ZWEI AUS THERMOPLASTISCHEM MATERIAL BESTEHENDEN FÜGEPARTNER MITTELS LASERSTRAHLUNG
(EN) APPARATUS AND PROCESS FOR JOINING AT LEAST TWO ITEMS COMPOSED OF THERMOPLASTIC MATERIAL BY MEANS OF LASER RADIATION
(FR) DISPOSITIF ET PROCÉDÉ D'ASSEMBLAGE D'AU MOINS DEUX ASSOCIÉS DE COLLAGE CONSTITUÉS DE MATÉRIAU THERMOPLASTIQUE AU MOYEN D'UN RAYONNEMENT LASER
Zusammenfassung
(DE)
Beschrieben wird eine Vorrichtung sowie ein Verfahren zum Fügen wenigstens zweier jeweils aus thermoplastischem Material bestehenden Fügepartnern mittels Laserstrahlung. Die Erfindung zeichnet sich dadurch aus, dass wenigstens ein optisches, den Laserstrahl beeinflussendes Element vorgesehen ist, durch das der Laserstrahl eine geometrische Strahlform und/oder eine Strahlungsintensitätsverteilung längs wenigstens einer Strahlquerschnittsebene annimmt, in der der Laserstrahl einen mittigen Laserstrahlbereich und zumindest einen den mittigen Laserstrahlbereich peripher zumindest teilweise umgebenden Laserstrahlbereich aufweist, dass in dem mittigen Laserstrahlbereich eine niedrigere Laserstrahlintensität vorherrscht als in dem peripher zumindest teilweise umgebenden Laserstrahlbereich.
(EN)
An apparatus and a process are described for joining at least two items each composed of thermoplastic material by means of laser radiation, using a laser emitting the laser radiation and using at least one element focusing the laser radiation onto a three-dimensional region, where at least sections of the two items have a shared joining plane and the two items enter into a mutual cohesive bond when the laser radiation melts the material, and where the wavelength of the laser radiation has been selected in such a way that the laser radiation can be absorbed to some extent on passage through the thermoplastic material of each of the two items. A feature of the invention is that at least one optical element influencing the laser beam has been provided and gives the laser beam a geometric beam shape and/or a beam intensity distribution along at least one beam-cross-section plane in which the laser beam has a central laser beam region and has at least one laser beam region at least to some extent peripherally surrounding the central laser beam region, and that a lower laser beam intensity prevails in the central laser beam region than in the at least to some extent peripherally surrounding laser beam region, and that the beam-cross-section plane is at least in the region of a surface of at least one item, by way of which surface the laser beam penetrates one of the items, and that in the joining plane the peripheral at least to some extent surrounding laser beam region and the central laser beam region can be focused onto the three-dimensional region and give a laser beam intensity which is sufficient to melt the two items in the three-dimensional region.
(FR)
La présente invention concerne un dispositif et un procédé servant à assembler au moins deux associés de collage respectivement constitués de matériau thermoplastique au moyen d'un rayonnement laser, avec un laser émettant le rayonnement laser et au moins un élément focalisant le rayonnement laser sur un domaine volumique, dans lequel les deux associés de collage comportent au moins par passages un plan d'assemblage commun et dans lequel les deux associés de collage sont soumis à une liaison de matière mutuelle au passage d'une fusion de matériau induite par le rayonnement laser, la longueur d'onde du rayonnement laser étant choisie de telle sorte que le rayonnement laser puisse être partiellement absorbé lors de son passage par le matériau thermoplastique de chacun des associés de collage. L'invention se caractérise en ce que le dispositif comporte au moins un élément optique influençant le faisceau laser par lequel le faisceau laser adopte une forme de faisceau géométrique et/ou une distribution d'intensité de rayonnement le long d'au moins un plan de la section du faisceau, dans lequel le faisceau laser comporte une zone de faisceau laser centrée et au moins une zone de faisceau laser périphérique entourant au moins partiellement la zone de faisceau laser centrée, en ce que l'intensité du faisceau laser dans la zone de faisceau laser centrée est inférieure à celle de la zone de faisceau laser périphérique l'entourant au moins partiellement, en ce que le plan de la section du faisceau est situé au moins dans la zone d'une surface d'au moins un associé de collage, surface sur laquelle le faisceau laser entre dans un des associés de collage et en ce que la zone de faisceau laser périphérique entourant au moins partiellement et la zone de faisceau laser centrée sont focalisables dans le domaine volumique dans le plan d'assemblage et fournissent une intensité de faisceau laser qui est suffisante pour fusionner les deux associés de collage dans le domaine volumique.
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